Cayoosh Mountain is a mountain summit located in the

Cayoosh Range The Cayoosh Range is the northernmost section of the Lillooet Ranges, which are a subrange of the Pacific Ranges of the Coast Mountains in British Columbia, Canada. The range covers an area of c. 3770 km² (1455 sq mi) and is approximately 65 ...

in southwestern

British Columbia British Columbia (commonly abbreviated as BC) is the westernmost province of Canada, situated between the Pacific Ocean and the Rocky Mountains. It has a diverse geography, with rugged landscapes that include rocky coastlines, sandy beaches, ...

Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...

. It is situated east-northeast of Pemberton, north-northeast of

Lillooet Lake Lillooet Lake is a lake in British Columbia, Canada about 25 km in length and about 33.5 square kilometres (22 mi²) in area. It is about 95 km downstream from the source of the Lillooet River, which resumes its course after leaving ...

, and immediately north of

Cayoosh Pass Cayoosh Pass (1,275 m / 4,183 ft) is a mountain pass in the Lillooet Ranges of the Pacific Ranges of the southern Coast Mountains in British Columbia, Canada. It lies just west of Duffey Lake on BC Highway 99 between the towns of Lillooet an ...

. Its nearest higher peak is

Mount Marriott Mount Marriott is a mountain located in British Columbia, Canada. It is a dry peak near the head of the Cayoosh Creek. It is easily reached by trail, and the best time to climb the mountain is in the month of July. There are a few lakes in close pr ...

, to the north-northeast. Precipitation

runoff Runoff, run-off or RUNOFF may refer to: * RUNOFF, the first computer text-formatting program * Runoff or run-off, another name for bleed, printing that lies beyond the edges to which a printed sheet is trimmed * Runoff or run-off, a stock market ...

from the peak drains into

Cayoosh Creek Cayoosh Creek is a northeast-flowing tributary of the Seton River in the Canadian province of British Columbia. The name Cayoosh Creek remains on the bridge-sign crossing the stream on BC Highway 99 and continues in use locally to refer to the f ...

and other tributaries of the

Fraser River The Fraser River is the longest river within British Columbia, Canada, rising at Fraser Pass near Blackrock Mountain in the Rocky Mountains and flowing for , into the Strait of Georgia just south of the City of Vancouver. The river's annual d ...

. The mountain's name was submitted by Karl Ricker, a mountaineer, and was officially adopted on January 23, 1979, by the

Geographical Names Board of Canada The Geographical Names Board of Canada (GNBC) is a national committee with a secretariat in Natural Resources Canada, part of the Government of Canada, which authorizes the names used and name changes on official federal government maps of Canada ...

Climate

Based on the

Köppen climate classification The Köppen climate classification is one of the most widely used climate classification systems. It was first published by German-Russian climatologist Wladimir Köppen (1846–1940) in 1884, with several later modifications by Köppen, notabl ...

, Cayoosh Mountain is located in a

subarctic climate The subarctic climate (also called subpolar climate, or boreal climate) is a climate with long, cold (often very cold) winters, and short, warm to cool summers. It is found on large landmasses, often away from the moderating effects of an ocean, ge ...

zone of western

North America North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...

. Most

weather front A weather front is a boundary separating air masses for which several characteristics differ, such as air density, wind, temperature, and humidity. Disturbed and unstable weather due to these differences often arises along the boundary. For in ...

s originate in the

Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the continen ...

, and travel east toward the

Coast Mountains The Coast Mountains (french: La chaîne Côtière) are a major mountain range in the Pacific Coast Ranges of western North America, extending from southwestern Yukon through the Alaska Panhandle and virtually all of the Coast of British Columbia ...

where they are forced upward by the range (

Orographic lift Orographic lift occurs when an air mass is forced from a low elevation to a higher elevation as it moves over rising terrain. As the air mass gains altitude it quickly cools down adiabatically, which can raise the relative humidity to 100% and cr ...

), causing them to drop their moisture in the form of rain or snowfall. As a result, the Coast Mountains experience high precipitation, especially during the winter months in the form of snowfall. Temperatures can drop below −20 °C with wind chill factors below −30 °C. This climate supports a glacier on the northeast slope of this mountain. The months July through September offer the most favorable weather for climbing Cayoosh Mountain.

Climbing Routes

Established climbing routes on Cayoosh Mountain: * East Face - a winter route * Southwest Ridge - First ascent 1978 * South Ridge - * North Ridge -

Gallery

File:Cayoosh reflection.jpg, Cayoosh Mountain reflection File:Cayoosh Mountain and Mt. Marriott.jpg, Cayoosh Mountain, southern aspect, as seen from

Slalok Mountain Slalok Mountain, originally known as Rex's Pillar, is a mountain summit located in the Coast Mountains, in Joffre Lakes Provincial Park, in southwestern British Columbia, Canada. It is the third-highest point of the Joffre Group, which is a subs ...

(Mt. Marriott in upper right)

References

External links

* Weather
Cayoosh Mountain
* Climbing Cayoosh in winter
YouTube
{{Pacific Ranges Two-thousanders of British Columbia Lillooet Ranges

Climate

Climbing Routes

Gallery

See also

References

External links